Thursday Code Puzzler: Count The Lines Of Code

His code formated is

public class LinesOfCode { 
	public static void main(String[] args) { 
		try { 
			BufferedReader reader = new BufferedReader(
				new FileReader("Program.java")); 
			int totalLine = 0; 
			String line = ""; 
			while ((line = reader.readLine()) != null) { 
				line = line.trim(); 
				// catch comments 
				if (line.startsWith("//") || line.startsWith("/*") ||
					line.startsWith("*/") || line.startsWith("*") || 
					line.isEmpty())
					continue; 
				totalLine++; 
			} 
			System.out.println("Total Lines: " + totalLine); 
		} catch (FileNotFoundException e) { 
			e.printStackTrace(); 
		} catch (IOException e) { 
			e.printStackTrace(); 
		} 
	} 
} 

 I don't think this solution is perfect because it assumes that the code has been formatted in a particular manner. It assumes that

- all single line comments are on a separte line.

- all block comments  have * at the start of each line

- all block comments end on a separate line

- every line of a block comment starts with a *

Anyway, a good try.

import java.io.File;
import java.util.Scanner;
import java.util.regex.Pattern;

public class CodeLines
{
	public static void main(String[] args) throws Exception
	{
		// load file
		//
		String code = new Scanner(new File(args[0])).useDelimiter("\\A").next();
		
		// strip comments
		//
		code = Pattern.compile("/\\*.*?\\*/|//.*?$", Pattern.MULTILINE | Pattern.DOTALL).matcher(code).replaceAll("");
		
		// split into array using non empty lines as delimiters
		//
		String[] s = Pattern.compile("\\S.*?$", Pattern.MULTILINE).split(code.trim());
		
		// count
		//
		System.out.println(s.length);
	}
}